Comments (8)
ow, its an easy fix
http://stackoverflow.com/questions/12273858/how-to-make-webgl-canvas-transparent
tried that, works fine now..
from pixijs.
hmm, but the alpha is now out in chrome
from pixijs.
so close! ya could try try removing the premultipliedAlpha from thw webGL creation context?
from pixijs.
I'm also having issues with transparent background with WebGL renderer. Background is transparent only in Opera, new Safari, Chrome and Firefox with WebGL leaves it green.
<html>
<head>
<title>Playground</title>
<style>
body {
margin: 0;
padding: 0;
background-color: #000000;
}
#circle {
display: none;
}
</style>
</head>
<body>
<canvas id="circle" width="300" height="300"></canvas>
<script src="../pixi.js/bin/pixi.js"></script>
<script>
var canvas = document.getElementById('circle');
if (canvas.getContext) {
// Preparing canvas cirlce
var context = canvas.getContext('2d');
context.beginPath();
context.fillStyle = "rgb(255,0,0)";
context.arc(canvas.width/2,canvas.height/2,150,0,Math.PI*2,false);
context.fill();
context.closePath();
// create an new instance of a pixi stage
var stage = new PIXI.Stage(0x66FF99);
var renderer = PIXI.autoDetectRenderer(500, 500, null, true);
document.body.appendChild(renderer.view);
var circleTexture = PIXI.Texture.fromCanvas(document.getElementById("circle"));
var circle = new PIXI.Sprite(circleTexture);
circle.position.x = 100;
circle.position.y = 100;
stage.addChild(circle);
function animate() {
renderer.render(stage);
requestAnimFrame( animate );
}
requestAnimFrame(animate);
} else {
alert("At least HTML5 Canvas support required");
}
</script>
</body>
</html>
from pixijs.
Looks like this is fixed in the dev branch by this commit: a479e27
from pixijs.
Looks like the bug still persists. I'm using the same code above and the latest pixi from master (1.2.0), but background of the stage isn't transparent in Safari and FF. In Chrome and Opera everything is fine.
from pixijs.
I can confirm that this bug still persists when using the WebGLRenderer. If you open http://jsfiddle.net/SamFent/yvh4k/ in FireFox, you will see that the background is opaque and covers the text behind the canvas.
The basic fix for this seems to be fairly simple: when we are requesting a transparent background, it seems we have to use gl.clearColor(0,0,0,0).
Making this simple change fixes the issue in FireFox:
However, this fix alone introduces a weird antialiasing issue in Chrome. In my example above with the nicely-rendered svg spheres with gradients, we suddenly get an ugly grey line around the spheres that seems to have been caused by the clipping of the edges:
The fix for this seems to be to set premultipliedAlpha to true (where it was before the fix above (a479e27) was applied). Setting premultipliedAlpha: true returns the svg images to being rendered without ugly clipping:
I have added a pull request for this fix here: #345
from pixijs.
This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
from pixijs.
Related Issues (20)
- Bug: Publishing v7.x doesn't update latest dist-tags
- Bug: [v8 regression] moving a crowded `Container` drastically cuts performance HOT 8
- Bug: [v8] When adding `onRender` to a class extension, it does not work as expected
- Feature Request: [v8] Is there any way to pass a canvas instance to the new WebGLRenderer? HOT 2
- Bug: export image empty on firefox
- Bug: v8 Using webcam stream as source errors in Chrome
- Bug: [v8] passing `fill(0)` or `fill(0x000000)` to graphics shows white instead of black
- Q: [v8] Should release `@pixi/unsafe-eval@8`? HOT 3
- Bug: [v8] The filter is not taking the RenderTexture's frame's offset into account when being applied HOT 1
- Bug: Fill hex for black produces unpredictable results HOT 1
- Bug: Could not render app.canvas to normal canvas correctly in Windows chrome
- Bug: roundPixels=true causing precision issues HOT 1
- [V8] Error with `new Sprite(null)` HOT 2
- Bug: v8.x Sprites not rendering in Chrome/Edge Windows 11 HOT 5
- Bug: [V8] Container.removeChildren performance issue HOT 2
- Bug: `loadTextures` ignores provided format HOT 1
- Feature Request: Put again sync methods in ExtractSystem
- Bug: requestVideoFrameCallback does not seem to be working as expected
- Bug: v8.0.3+ addressMode is repeat by default
- Bug: [v8] Unable `wordWrap: true` with Pixi.BitmapText
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from pixijs.